JP6408507B2 - Rough terrain vehicle - Google Patents

Description

  The present invention relates to an uneven terrain vehicle having an engine and an accelerator operation unit.

  Conventionally, rough terrain vehicles that can travel on rough terrain are known (see, for example, Patent Document 1). The rough terrain vehicle has a simple structure in which, for example, a TBW (throttle-by-wire) throttle control mechanism and a mechanism in which an occupant manually performs a clutch operation are not mounted, as compared with a general vehicle.

Japanese Patent Laying-Open No. 2015-67022

  By the way, the present applicant has installed a twin clutch type automatic transmission (dual clutch transmission), which is a kind of automatic transmission, on a rough terrain vehicle, and manually operates a clutch operating unit such as a paddle shift. We are developing a rough terrain vehicle that can be operated by clutch. As described above, regarding the rough terrain vehicle on which the twin clutch type automatic transmission is mounted but the TBW is not mounted, the engine rotational speed of the engine is increased before starting (when preparing for starting). A method for increasing the acceleration has not been established yet.

  That is, the conventional rough terrain vehicle does not have a TBW and cannot automatically start suddenly. In addition, since there is no operation unit for the passenger to perform clutch operation, it is impossible to start suddenly after maintaining the engine speed at a high speed when preparing for starting.

  Accordingly, an object of the present invention is to provide an uneven terrain vehicle that can prepare for starting an uneven terrain vehicle in which a twin clutch type automatic transmission is mounted but a TBW is not mounted.

  The rough terrain vehicle (10) according to the present invention includes an engine (24) and an accelerator operation unit (20) operated by an occupant, and has the following characteristics.

First feature: The rough terrain vehicle (10) includes a twin-clutch automatic transmission (30) that transmits the output of the engine (24) to wheels (28), and a clutch operation unit that is operated by the occupant. (22a, 22b) and the engine (24) and the twin clutch automatic transmission (30) based on the operation of the accelerator operation unit (20) and / or the clutch operation unit (22a, 22b) by the occupant. ), The control means (32) for controlling the traveling of the rough terrain vehicle (10), the engine speed (Ne) of the engine (24) and the twin clutch automatic transmission (30). The first clutch configuration (54) and the second clutch configuration (56) showing the relationship with the clutch hydraulic pressure amount of the clutch. The first clutch configuration (54) is less in the clutch hydraulic pressure for the same engine speed (Ne) than the second clutch configuration (56).

In this case, the control means (32) operates the clutch operation part (22a, 22b) and the accelerator operation part (20) when preparing to start the rough terrain vehicle (10). when, on the basis of the first clutch configuration (54), wherein setting the clutch oil pressure amount corresponding to the engine speed (Ne), and the previous chrysanthemums latch intercepted, the output of the engine (24) increase.

On the other hand, the control means (32) is based on the second clutch configuration (56) when the operation of the clutch operation section (22a, 22b) is released when the rough terrain vehicle (10) starts. The clutch hydraulic pressure is set according to the engine speed (Ne), the clutch is engaged, and the wheel (28) is connected from the engine (24) via the twin clutch automatic transmission (30). The output of the engine (24) is transmitted to the vehicle to start the rough terrain vehicle (10).

In addition, the control means (32), when shifting from the start preparation time to the start time, when the operation of the clutch operation part (22a, 22b) is released, the first clutch form (54) and the When the clutch hydraulic pressure is increased at a constant rate without using the second clutch configuration (56), and the clutch hydraulic pressure reaches the clutch hydraulic pressure based on the second clutch configuration (56), the second clutch configuration Based on (56), the clutch hydraulic pressure amount corresponding to the engine speed (Ne) is set.

2nd characteristic; The said control means (32) is the said 1st clutch form (54, when the said clutch operation part (22a, 22b) is operated by the said passenger | crew during driving | running | working of the rough terrain vehicle (10). ) Based on the engine speed (Ne).

  Thereafter, when the operation of the clutch operating portion (22a, 22b) is released, the control means (32) is configured to control the engine speed (Ne) according to the engine speed (Ne) based on the second clutch configuration (56). By setting the clutch hydraulic pressure, the clutch is connected, and the output of the engine (24) is transmitted from the engine (24) to the wheel (28) via the twin clutch type automatic transmission (30). Thus, the rough terrain vehicle (10) is reaccelerated.

Third feature: The control means (32) performs fuel injection cut for the engine (24) when the engine speed (Ne) is equal to or higher than a predetermined speed (Neth) during the start preparation. The engine speed (Ne) is maintained at the predetermined speed (Neth).

4th characteristic; The said accelerator operation part (20) is an accelerator pedal, The said clutch operation part (22a, 22b) is a paddle shift provided in the steering wheel (12) which the said passenger | crew steers.

  In this case, the control means (32) disengages the clutch when the paddle shift (22a, 22b) is operated and the accelerator pedal (20) is depressed during the start preparation, Increase the output of the engine (24). On the other hand, at the time of starting, the control means (32) connects the clutch when the paddle shift (22a, 22b) is returned to the initial position so that the engine (24) The output of the engine (24) is transmitted to the wheels (28) via the transmission (30).

Fifth feature: The paddle shift (22a, 22b) is provided on each of the left and right sides of the handle (12).

  In this case, the control means (32) disengages the clutch when each paddle shift (22a, 22b) is operated and the accelerator pedal (20) is depressed during the start preparation. , Increase the output of the engine (24). On the other hand, when the vehicle starts, the control means (32) connects the clutch when the paddle shifts (22a, 22b) are returned to the initial position, and the twin clutch type is connected from the engine (24). The output of the engine (24) is transmitted to the wheels (28) via the automatic transmission (30).

  According to the first feature of the present invention, at the time of start preparation, when the clutch operation unit and the accelerator operation unit are operated, the clutch of the twin clutch type automatic transmission is disconnected to increase the output of the engine. Thereby, before the start of the rough terrain vehicle, the engine speed can be maintained at a high level without transmitting the engine output to the wheels while the rough terrain vehicle is stopped.

  On the other hand, at the time of starting, when the operation of the clutch operation unit is released, the clutch is connected, and the engine output is transmitted from the engine to the wheels via the twin clutch type automatic transmission. In this case, since the engine is maintained at a high engine speed until immediately before starting, the occupant operates the accelerator operation unit to set an arbitrary throttle opening, thereby accelerating performance at the start of the rough terrain vehicle. Can be improved.

  Therefore, according to the first feature, the twin clutch type automatic transmission is mounted, but the TBW is not mounted on the rough terrain vehicle, based on the operation of the clutch operation unit and the accelerator operation unit by the occupant. By controlling the twin clutch type automatic transmission, the vehicle can be started with improved acceleration performance of the rough terrain vehicle.

  Here, the above-mentioned “disengagement of the clutch” means that the clutch is completely disengaged, or that the clutch is in a half-clutch state, and that the clutch is not completely connected.

Further , according to the first feature, at the time of start preparation, a clutch hydraulic pressure amount corresponding to the engine speed is set based on the first clutch mode. On the other hand, at the time of start, a clutch hydraulic pressure amount corresponding to the engine speed is set based on the second clutch configuration. Thereby, the connection / disconnection of the clutch which comprises a twin clutch type automatic transmission can be controlled efficiently.

Further, according to the first feature, the clutch hydraulic pressure amount in the first clutch configuration is set to be smaller than the clutch hydraulic pressure amount in the second clutch configuration for the same engine speed. Thereby, at the time of start preparation, the twin clutch type automatic transmission is set to a half clutch state, and the engine speed can be increased as much as possible so that the rough terrain vehicle does not start. As a result, the rough terrain vehicle can be started by connecting the clutch when starting. Furthermore , according to the first feature, the engine speed is maintained at a high speed until immediately before starting. As a result, the clutch is engaged and the output of the engine is transmitted to the wheels via the twin clutch type automatic transmission, so that the rough terrain vehicle can be started at a rapid acceleration.

According to the second feature of the present invention, when the rough operation vehicle is traveling, the clutch operation unit is operated, so that the situation is the same as at the start of the start, and then the operation of the clutch operation unit is released. Rough terrain vehicles will accelerate again. Thereby, even when the engine speed decreases during traveling, the engine speed can be easily increased and re-accelerated. In addition, the occupant can feel acceleration again during traveling.

  In preparation for starting the rough terrain vehicle, the engine output with respect to the engine speed increases to a certain value due to the operation of the accelerator operation unit of the occupant, but then decreases. As a result, if the clutch is connected in a state where the output of the engine is lowered, it becomes difficult to start the rough terrain vehicle. Moreover, since the TBW is not mounted on the rough terrain vehicle, it is difficult to adjust the throttle valve.

Therefore, in the third feature of the present invention, when the engine speed is equal to or higher than a predetermined speed at the time of starting preparation, a fuel injection cut to the engine is executed to maintain the engine speed at the predetermined speed. . Accordingly, since the clutch is connected in a state where the engine is maintained at the maximum output, it is possible to easily start the rough terrain vehicle with high acceleration performance.

According to the fourth feature of the present invention, the occupant can step on the accelerator pedal while operating the paddle shift while grasping the steering wheel, so that the operability is improved. As a result, at the time of starting preparation and at the time of starting, it is possible to appropriately control the engine and the twin clutch type automatic transmission according to the operation of the occupant.

According to the fifth feature of the present invention, paddle shifts are provided on both the left and right sides of the handle, respectively, and when the left and right paddle shifts are operated and the accelerator pedal is depressed, the clutch is disengaged and the engine output Increase. As a result, the engine speed can be increased efficiently at the start preparation. On the other hand, when the left and right paddle shifts are returned to the initial position, the clutch is connected and the engine output is transmitted to the wheels via the twin clutch type automatic transmission. You can start with.

It is a partial front view of the rough terrain vehicle according to the present embodiment when an occupant looks forward. It is a block diagram of the rough terrain vehicle according to the present embodiment. It is a timing chart for demonstrating the operation | movement at the time of start preparation of the rough terrain vehicle, and start.

  The rough terrain vehicle according to the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments.

[Configuration of this embodiment]
FIG. 1 is a partial front view when an occupant seated on a seat looks forward in the rough terrain vehicle 10 according to the present embodiment.

  In the rough terrain vehicle 10, a handle 12 that the occupant steers is provided in front of the occupant. A meter 14 for displaying various information is disposed in front of the handle 12, and a shift lever 16 is provided on the right side of the handle 12. A brake pedal 18 and an accelerator pedal 20 (accelerator operation unit) are disposed below the handle 12 and the shift lever 16.

  The handle 12 is a steering wheel, and includes a wheel rim 12a, three spokes 12b to 12d extending radially inward from the wheel rim 12a, and a pad 12e connecting the spokes 12b to 12d.

  A left paddle switch 22a (clutch operating section, paddle shift) extends from the pad 12e along the left spoke 12b toward the wheel rim 12a, while a right paddle switch extends from the pad 12e along the right spoke 12c. 22b (clutch operating portion, paddle shift) extends toward the wheel rim 12a. The left paddle switch 22a and the right paddle switch 22b swing back and forth by the operation of the occupant with the pad 12e side as the base end.

  FIG. 2 is a block diagram of the rough terrain vehicle 10. The rough terrain vehicle 10 further includes an engine 24 and a twin clutch type automatic transmission 30 as an automatic transmission that transmits the output of the engine 24 to the wheels 28 via the open differential 26. Since the configurations of the engine 24, the twin clutch type automatic transmission 30 and the open differential 26 are well known, detailed description thereof will be omitted.

  The engine 24 and the twin clutch type automatic transmission 30 are controlled by an ECU 32 as control means. The ECU 32 receives detection signals from sensors disposed in the rough terrain vehicle 10 and command signals from operation units operated by the occupant. The ECU 32 controls the engine 24 and the twin clutch type automatic transmission 30 based on these detection signals and command signals.

  Specifically, when the occupant operates the shift lever 16, a command signal (subtra signal) corresponding to the operation result is input to the ECU 32. The subtra signal is a signal indicating the shift position of the shift lever 16. In the present embodiment, the shift position is, for example, a parking position (P range), a reverse position (R range), a neutral position (hereinafter also referred to as N range or N), and a drive position (D range). In the following description, the in-gear position refers to the D range. The D range includes a high range (Hi range) and a low range (Lo range).

  When the occupant operates the left paddle switch 22a or the right paddle switch 22b to instruct upshifting or downshifting with respect to the transmission gear stage of the twin clutch type automatic transmission 30, a command signal (upshifting according to the operation result) Signal or shift-down signal) is input to the ECU 32.

  That is, when the occupant operates the left paddle switch 22a, a shift-up signal instructing a shift-up is output to the ECU 32. When the occupant operates the right paddle switch 22b, a downshift signal for instructing downshift is output to the ECU 32. Further, when the occupant operates both the left paddle switch 22a and the right paddle switch 22b at substantially the same time (when pulled to the occupant side at the same time), disconnection of the clutch constituting the twin clutch type automatic transmission 30 (hereinafter referred to as clutch engagement). A command signal (clutch disengagement signal) instructing is also output to the ECU 32.

  When the passenger releases the left paddle switch 22a and / or the right paddle switch 22b, the left paddle switch 22a and / or the right paddle switch 22b returns to the initial position, and the left paddle switch 22a and / or the right paddle switch 22b The output of the command signal to the ECU 32 stops. That is, a command signal is output to the ECU 32 while the occupant operates the left paddle switch 22a and / or the right paddle switch 22b.

  The brake pedal sensor 34 detects the amount of depression of the brake pedal 18 by the occupant and outputs it to the ECU 32. The accelerator pedal sensor 36 detects the amount of depression of the accelerator pedal 20 by the occupant and outputs it to the ECU 32.

  The throttle opening sensor 38 detects the opening (throttle opening) of the throttle valve 40 and outputs it to the ECU 32. The engine speed sensor 42 detects the engine speed Ne of the engine 24 and outputs it to the ECU 32. The vehicle speed sensor 44 detects the vehicle speed of the rough terrain vehicle 10 and outputs it to the ECU 32. The gear position sensor 46 detects the gear position that is the gear position of the twin clutch type automatic transmission 30 and outputs it to the ECU 32. The ECU 32 displays the engine speed Ne, the vehicle speed, and the transmission gear stage on the screen of the meter 14.

  The ECU 32 adjusts the throttle opening based on the detection signals from the brake pedal sensor 34, the accelerator pedal sensor 36, the throttle opening sensor 38, the engine speed sensor 42, and the vehicle speed sensor 44, and supplies a control signal to the injector 48. Thus, fuel is injected, and an ignition signal is supplied to the ignition coil 50 to ignite the spark plug.

  In addition, when the shift lever 16 is in the D range which is the in-gear position, the ECU 32 receives the upshift signal or the input upshift signal when the upshift signal or the downshift signal is input from the left paddle switch 22a or the right paddle switch 22b. A drive signal corresponding to the downshift signal is supplied to the shift motor 52. The shift motor 52 rotates a shift drum (not shown) in the twin clutch type automatic transmission 30 based on the drive signal. The shift fork is displaced in the axial direction of the shift drum by the rotation of the shift drum, and the meshing of the gears on the counter shaft and the main shaft is changed, whereby the shift up or the shift down is executed.

  Further, the ECU 32 has a map 57 including a first clutch form 54 and a second clutch form 56 showing the relationship between the engine speed Ne and the hydraulic pressure of the clutch constituting the twin clutch automatic transmission 30 (clutch hydraulic pressure amount). . The first clutch configuration 54 is set so that the hydraulic pressure is lower (the clutch hydraulic pressure is smaller) with respect to the same engine speed Ne as compared to the second clutch configuration 56.

  Then, the ECU 32 determines whether the twin clutch type automatic transmission 30 is in accordance with whether or not the left paddle switch 22a and the right paddle switch 22b are pulled to the occupant side substantially simultaneously (whether or not a clutch disengagement signal is input to the ECU 32). Controls clutch connection / disconnection.

  That is, if the left paddle switch 22a and the right paddle switch 22b are not pulled to the occupant side substantially at the same time, and no clutch disengagement signal is input to the ECU 32, the ECU 32 determines that the clutch needs to be in an engaged state. To do. Then, the ECU 32 refers to the first clutch form 54 or the second clutch form 56 of the map 57 and sets the oil pressure (target oil pressure) according to the engine speed Ne. In this case, the ECU 32 supplies a relatively high level drive signal corresponding to the target hydraulic pressure to the first valve 58 and the second valve 60 that are linear solenoid valves. When the first valve 58 and the second valve 60 are opened according to the drive signal, hydraulic pressure is applied to the clutch from an oil tank (not shown) to bring the clutch into a connected state.

  On the other hand, when the left paddle switch 22a and the right paddle switch 22b are pulled to the occupant side substantially simultaneously and a clutch disengagement signal is input to the ECU 32, the ECU 32 determines that the disengagement of the clutch has been instructed, and the first clutch configuration 54 or Referring to the second clutch form 56, the target hydraulic pressure is set according to the engine speed Ne. In this case, the ECU 32 supplies a low-level drive signal corresponding to the target hydraulic pressure to the first valve 58 and the second valve 60, and operates the first valve 58 and the second valve 60 in the closing direction. Thereby, the application of the hydraulic pressure to the clutch is stopped, and the clutch is disconnected.

  In this embodiment, the ECU 32 sets the target hydraulic pressure according to the engine speed Ne with reference to the first clutch form 54 before the start of the rough terrain vehicle 10 (at the time of start preparation). Thus, when the rough terrain vehicle 10 travels (starts), the target hydraulic pressure is set according to the engine speed Ne with reference to the second clutch configuration 56. That is, the map 57 has two speed change forms (first clutch form 54 and second clutch form 56), and the ECU 32 performs the first clutch form 54 or the second clutch for one map 57 before or at the start. Switch to the clutch form 56 and set the target oil pressure. Further, in the present embodiment, “disengage the clutch” is a concept including completely disengaging the clutch and bringing the clutch into the half-clutch state, and the clutch is not completely connected. State.

[Operation of this embodiment]
Next, the operation of the rough terrain vehicle 10 according to the present embodiment will be described with reference to the timing chart of FIG. In this description of operation, description will be made with reference to FIGS. 1 and 2 as necessary.

  First, in a state where the rough terrain vehicle 10 is stopped, the occupant operates the shift lever 16 at time t0 to in-gear the D range. Thereby, the subtra signal input to the ECU 32 is switched from the signal (N) indicating the neutral position to the signal (H) indicating the in-gear position (D range). In this case, the ECU 32 refers to the second clutch form 56 and sets the target hydraulic pressure according to the engine speed Ne (Ne≈0).

  Next, when the occupant pulls the left paddle switch 22a and the right paddle switch 22b to the occupant side (near side) substantially simultaneously at time t1, a clutch disengagement signal is input to the ECU 32. The ECU 32 determines that clutch disconnection is instructed based on the input clutch disconnection signal. Then, the ECU 32 switches from the second clutch form 56 to the first clutch form 54 and refers to the switched first clutch form 54 to determine to set the target hydraulic pressure.

  Thereafter, the ECU 32 refers to the first clutch form 54, sets a target oil pressure according to the engine speed Ne, and supplies a drive signal according to the set target oil pressure to the first valve 58 and the second valve 60. . As a result, the first valve 58 and the second valve 60 are closed, so that the application of hydraulic pressure to the clutch is stopped and the clutch is disconnected.

  Next, at the time t2, the occupant steps on the accelerator pedal 20 with the right foot while pulling the left paddle switch 22a and the right paddle switch 22b forward. In this case, the accelerator pedal sensor 36 detects the depression amount of the accelerator pedal 20 and outputs it to the ECU 32.

  The ECU 32 adjusts the throttle opening of the throttle valve 40 according to the depression amount of the accelerator pedal 20, controls the injector 48 to inject fuel, supplies an ignition signal to the ignition coil 50, and ignites the spark plug. . As a result, the throttle opening increases with the passage of time from time t2. Further, the engine speed Ne increases with the passage of time from the time point t3 following the increase in the throttle opening.

  In this case, since the twin clutch type automatic transmission 30 is in a clutch disengaged state, power transmission between the engine 24 and the open differential 26 is interrupted. Therefore, the output of the engine 24 is not transmitted to the wheels 28. That is, the rough terrain vehicle 10 does not start in the time period from the time point t1 to the time point t5.

  Then, the occupant keeps stepping on the accelerator pedal 20 so as to maintain the desired high engine speed Ne while checking the engine speed Ne displayed on the meter 14. As a result, the throttle opening is maintained at a predetermined opening during the time period from time t4 to time t5, and the engine speed Ne increases or decreases within a certain range as time elapses.

  On the other hand, in the time period from the time point t1 to the time point t5, the ECU 32 refers to the first clutch form 54, sets the target oil pressure according to the engine speed Ne, and outputs the drive signal according to the set target oil pressure. The first valve 58 and the second valve 60 are supplied. Thereby, the 1st valve 58 and the 2nd valve 60 maintain a closed state. As a result, the clutch hydraulic pressure maintains a low level value corresponding to the target hydraulic pressure.

  In FIG. 3, the time change of the target oil pressure according to the engine speed Ne based on the first clutch form 54 is indicated by a two-dot chain line, and the time change of the target oil pressure according to the engine speed Ne based on the second clutch form 56 is shown. Is indicated by a one-dot chain line, and the change over time of the target hydraulic pressure set by the ECU 32 is indicated by a solid line.

  At time t5, the occupant returns the left paddle switch 22a and the right paddle switch 22b to the initial positions, and further depresses the accelerator pedal 20 with the right foot. Thus, the ECU 32 determines that the occupant has an intention to start. Next, the ECU 32 increases the target hydraulic pressure at a constant rate with time so as to switch from the first clutch form 54 to the second clutch form 56.

  As a result, in the time period from time t5 to time t6, the ECU 32 increases the target hydraulic pressure without using the first clutch form 54 and the second clutch form 56, and outputs a drive signal corresponding to the increased target hydraulic pressure to the first. Supply to the valve 58 and the second valve 60. The first valve 58 and the second valve 60 are opened based on the drive signal, thereby applying hydraulic pressure to the clutch. Thereby, the clutch reaches a connected state.

  The engine speed Ne is kept high until just before starting (time t5). Therefore, when the clutch is engaged, the output of the engine 24 is transmitted to the wheels 28 via the twin clutch type automatic transmission 30 and the open differential 26. As a result, the rough terrain vehicle 10 starts at a rapid acceleration (rapid start) after time t5.

  The occupant further depresses the accelerator pedal 20 to maintain the state immediately after time t5 in order to make the rough terrain vehicle 10 start suddenly. As a result, the throttle opening increases rapidly with the passage of time immediately after time t5, but is thereafter maintained at a constant value. When the value of the target hydraulic pressure increased at a constant rate reaches the target hydraulic pressure value based on the second clutch configuration 56 at time t6, the ECU 32 switches to the second clutch configuration 56. Thereby, after the rough terrain vehicle 10 starts, the ECU 32 refers to the second clutch configuration 56 and sets the target hydraulic pressure according to the engine speed Ne.

  If the engine speed Ne decreases during traveling of the rough terrain vehicle 10, or if the driver wants to feel a sudden acceleration feeling at the time of starting, the occupant is left paddle switch 22a and right paddle switch at time t7. What is necessary is just to pull 22b near at the same time.

  Thereby, in the time zone from the time point t7 to the time point t8, the ECU 32 sets the target hydraulic pressure using the first clutch form 54 as in the above-described start preparation (time zone from the time point t1 to the time point t5). In this time zone, the clutch is disengaged or the half-clutch state is maintained, and the engine speed Ne increases.

  As a result, when the occupant returns the left paddle switch 22a and the right paddle switch 22b to the initial positions at the time t8, the clutch is connected, and the output of the high engine speed Ne passes through the twin clutch type automatic transmission 30 and the open differential 26. Is transmitted to the wheel 28. Thereby, after the time t8, the rough terrain vehicle 10 can be rapidly accelerated again.

  Further, when the rough terrain vehicle 10 is ready to start, the ECU 32 may perform control as indicated by a broken line in FIG.

  That is, after the clutch disengagement signal is input to the ECU 32 at time t1, the engine speed Ne increases rapidly with time, and when the predetermined speed threshold value Neth is reached at time t9, the injector 48 is controlled. Then, the fuel injection cut for the engine 24 is executed. Thereby, after the time point t1, the engine speed Ne is maintained at the speed threshold value Neth. Thereby, when the clutch is connected at the time point t5, the rough terrain vehicle 10 can be suddenly started at a high engine speed Ne (speed threshold value Neth).

[Effect of this embodiment]
As described above, according to the rough terrain vehicle 10 according to the present embodiment, when the rough terrain vehicle 10 is ready to start, the left paddle switch 22a, the right paddle switch 22b, and the accelerator pedal 20 are operated. In addition, the clutch of the twin clutch type automatic transmission 30 is disengaged to increase the output of the engine 24. Thereby, before the start of the rough terrain vehicle 10, it is possible to maintain the high engine speed Ne without transmitting the output of the engine 24 to the wheels 28 in a state where the rough terrain vehicle 10 is stopped. it can.

  On the other hand, at the time of starting, when the operation of the left paddle switch 22a and the right paddle switch 22b is released, the clutch is connected, and the engine 24 is connected from the engine 24 to the wheels 28 via the twin clutch type automatic transmission 30 and the open differential 26. The output of is transmitted. In this case, since the engine 24 is maintained at a high engine speed Ne until immediately before the start, the occupant operates the accelerator pedal 20 to set an arbitrary throttle opening degree, so that the rough terrain vehicle 10 is started. Acceleration performance can be improved.

  Therefore, according to the present embodiment, although the twin clutch type automatic transmission 30 is mounted, the left paddle switch 22a and the right paddle switch 22b by the occupant and the accelerator in the rough terrain vehicle 10 in which the TBW is not mounted. By controlling the engine 24 and the twin clutch type automatic transmission 30 based on the operation of the pedal 20, it is possible to start with the acceleration performance of the rough terrain vehicle 10 improved.

  Further, at the time of starting preparation, a target hydraulic pressure corresponding to the engine speed Ne is set based on the first clutch configuration 54. On the other hand, at the time of start, a target hydraulic pressure corresponding to the engine speed Ne is set based on the second clutch configuration 56. Thereby, the connection / disconnection of the clutch which comprises the twin clutch type automatic transmission 30 can be controlled efficiently.

  Further, the target oil pressure of the first clutch form 54 is set lower than the target oil pressure of the second clutch form 56 for the same engine speed Ne. Thereby, at the time of start preparation, the twin clutch type automatic transmission 30 can be set to a half clutch state, and the engine speed Ne can be increased as much as possible so that the rough terrain vehicle 10 does not start. As a result, the rough terrain vehicle 10 can be started by connecting the clutch when starting.

  Furthermore, when the rough terrain vehicle 10 is traveling, and the left paddle switch 22a and the right paddle switch 22b are operated, the situation is the same as when preparing for starting, and then the left paddle switch 22a and the right paddle switch 22b When the operation is released, the rough terrain vehicle 10 is accelerated again. Thus, even when the engine speed Ne decreases during traveling, the engine speed Ne can be easily increased and re-accelerated. In addition, the occupant can feel acceleration again during traveling.

  When the rough terrain vehicle 10 is ready to start, the output of the engine 24 with respect to the engine speed Ne increases to a certain value due to the operation of the accelerator pedal 20 by the occupant, but then decreases. As a result, if the clutch is connected in a state where the output of the engine 24 is reduced, it becomes difficult to start the rough terrain vehicle 10. Moreover, since the TBW is not mounted on the rough terrain vehicle 10, adjustment of the throttle valve 40 is difficult.

  Therefore, in the present embodiment, when the engine speed Ne is equal to or higher than the speed threshold value Neth at the time of starting preparation, a fuel injection cut is performed on the engine 24 to maintain the engine speed Ne at the speed threshold value Neth. To do. Thereby, at the time of start preparation, the engine speed Ne is maintained at the speed threshold value Neth corresponding to the maximum output of the engine 24. As a result, since the clutch is engaged at time t5 while the engine 24 is maintained at the maximum output, the rough terrain vehicle 10 can be easily started with high acceleration.

  Further, since the occupant can step on the accelerator pedal 20 while operating the left paddle switch 22a and the right paddle switch 22b while grasping the handle 12, the operability is improved. As a result, it is possible to appropriately control the engine 24 and the twin clutch type automatic transmission 30 according to the operation of the occupant at the time of starting preparation and at the time of starting.

  Furthermore, a left paddle switch 22a and a right paddle switch 22b are provided on both the left and right sides of the handle 12, respectively, and when both are pulled toward the occupant and the accelerator pedal 20 is depressed, the clutch is disengaged and the engine 24 Increase output. Thereby, the engine speed Ne can be increased efficiently at the time of start preparation. On the other hand, when the left paddle switch 22a and the right paddle switch 22b are returned to the initial positions, the clutch is connected and the output of the engine 24 is transmitted to the wheels 28 via the twin clutch type automatic transmission 30 and the open differential 26. Therefore, the rough terrain vehicle 10 can be started with strong acceleration.

  As mentioned above, although this invention was demonstrated using suitable embodiment, the technical scope of this invention is not limited to the description range of said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiments. It is apparent from the description of the scope of claims that the embodiments added with such changes or improvements can also be included in the technical scope of the present invention. In addition, the reference numerals in parentheses described in the claims are appended to the reference numerals in the accompanying drawings for easy understanding of the present invention. It should not be construed as limited.

DESCRIPTION OF SYMBOLS 10 ... Rough terrain vehicle 12 ... Handle 14 ... Meter 16 ... Shift lever 18 ... Brake pedal 20 ... Accelerator pedal (accelerator operation part)
22a ... Left paddle switch (clutch operating section, paddle shift)
22b ... Right paddle switch (clutch operating part, paddle shift)
DESCRIPTION OF SYMBOLS 24 ... Engine 26 ... Open differential 28 ... Wheel 30 ... Twin clutch type automatic transmission 32 ... ECU (control means) 34 ... Brake pedal sensor 36 ... Accelerator pedal sensor 38 ... Throttle opening sensor 40 ... Throttle valve 42 ... Engine speed Sensor 44 ... Vehicle speed sensor 46 ... Gear position sensor 48 ... Injector 50 ... Ignition coil 52 ... Shift motor 54 ... First clutch form 56 ... Second clutch form 57 ... Map 58 ... First valve 60 ... Second valve

Claims (5)

In the rough terrain vehicle (10) having the engine (24) and the accelerator operation unit (20) operated by the occupant,
A twin clutch type automatic transmission (30) for transmitting the output of the engine (24) to the wheels (28);
Clutch operating portions (22a, 22b) operated by the occupant;
By controlling the engine (24) and the twin clutch type automatic transmission (30) based on the operation of the accelerator operation unit (20) and / or the clutch operation unit (22a, 22b) by the occupant, Control means (32) for controlling the traveling of the rough terrain vehicle (10);
A first clutch configuration (54) and a second clutch configuration (56) showing the relationship between the engine speed (Ne) of the engine (24) and the clutch hydraulic pressure of the clutch of the twin clutch type automatic transmission (30); Further comprising
In the first clutch configuration (54), compared with the second clutch configuration (56), the clutch hydraulic pressure amount for the same engine speed (Ne) is small,
The control means (32)
When the rough terrain vehicle (10) is ready to start, when the clutch operation unit (22a, 22b) is operated and the accelerator operation unit (20) is operated, the first clutch configuration (54) The clutch hydraulic pressure amount according to the engine speed (Ne) is set, the clutch is disengaged, and the output of the engine (24) is increased.
On the other hand, when the rough terrain vehicle (10) starts, when the operation of the clutch operation unit (22a, 22b) is released, the engine speed (56) is determined based on the second clutch configuration (56). Ne), the clutch hydraulic pressure is set, the clutch is connected, and the engine (24) is connected to the wheel (28) from the engine (24) via the twin clutch type automatic transmission (30). By transmitting the output, the rough terrain vehicle (10) is started ,
The first clutch configuration (54) and the second clutch configuration (56) are used when the operation of the clutch operation section (22a, 22b) is released when the vehicle is shifted from the start preparation to the start. The clutch hydraulic pressure is increased at a constant rate, and when the clutch hydraulic pressure reaches the clutch hydraulic pressure based on the second clutch configuration (56), the engine speed is increased based on the second clutch configuration (56). number terrain vehicle, characterized in that you set the clutch oil pressure amount corresponding to (Ne) (10). The rough terrain vehicle (10) according to claim 1 ,
The control means (32)
When the clutch operating part (22a, 22b) is operated by the occupant during traveling of the rough terrain vehicle (10), the engine speed (Ne) is set based on the first clutch configuration (54). According to the clutch hydraulic pressure,
After that, when the operation of the clutch operation unit (22a, 22b) is released, the clutch hydraulic pressure amount corresponding to the engine speed (Ne) is set based on the second clutch configuration (56). By connecting the clutch and transmitting the output of the engine (24) from the engine (24) to the wheels (28) via the twin clutch automatic transmission (30), the rough terrain vehicle A rough terrain vehicle (10), characterized in that (10) is re-accelerated. In the rough terrain vehicle (10) according to claim 1 or 2 ,
The control means (32) performs fuel injection cut to the engine (24) when the engine speed (Ne) is equal to or higher than a predetermined speed (Neth) during the start preparation, and performs the engine rotation. A rough terrain vehicle (10) characterized in that the number (Ne) is maintained at the predetermined rotational speed (Neth). In the rough terrain vehicle (10) according to any one of claims 1 to 3 ,
The accelerator operation unit (20) is an accelerator pedal,
The clutch operating portions (22a, 22b) are paddle shifts provided on a handle (12) that the occupant steers,
The control means (32)
During the start preparation, the paddle shift (22a, 22b) is operated, and when the accelerator pedal (20) is depressed, the clutch is disengaged to increase the output of the engine (24),
At the time of starting, when the paddle shift (22a, 22b) is returned to the initial position, the clutch is connected, and the wheel is connected from the engine (24) via the twin clutch type automatic transmission (30). An uneven terrain vehicle (10), wherein the output of the engine (24) is transmitted to (28). The rough terrain vehicle (10) according to claim 4 ,
The paddle shift (22a, 22b) is provided on each of the left and right sides of the handle (12),
The control means (32)
During the start preparation, each paddle shift (22a, 22b) is operated, and when the accelerator pedal (20) is depressed, the clutch is disengaged to increase the output of the engine (24). ,
At the time of starting, when each of the paddle shifts (22a, 22b) is returned to the initial position, the clutch is connected and the engine (24) through the twin clutch type automatic transmission (30) An irregular terrain vehicle (10), wherein the output of the engine (24) is transmitted to a wheel (28).

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